Inline client-side JavaScript with browserify and express

client.coffee

browserify = require 'browserify'

client = (mount, fn) -> (browserify { mount }).addEntry 'main.js', body: '(' + fn + ')()'

# Usage:
app = express()
app.use client '/client.js', ->
  foo = require './foo'
  bar = require 'bar'
  foo 123, bar, 456

# /client.js now serves a bundle with the anonymous function as an entry,
# and require()d dependencies are added by browserify.